Here's a really old design from somewhere around '97. I made a 3D model of it too and even made a little animation of it walking. This was back when I was into organic shapes and mecha designs.
I was working on the computer game "Majesty: The Fantasy Kingdom Sim" at the time and hacked the little walking robot into the game so he showed up instead of the warrior (only on my computer!). Now those were good times!